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27101536f6
FLTK 1.5 requires at least C++11, hence we can always use 'override'. To do: the FL_OVERRIDE macro can be replaced by 'override' everywhere in the FLTK code. There are more than 2400 occurrences and this would be a large commit. Therefore it's not done right now... Note: user code may continue to use FL_OVERRIDE.
214 lines
5.3 KiB
C++
214 lines
5.3 KiB
C++
/*
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* Function attribute declarations for the Fast Light Tool Kit (FLTK).
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*
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* Copyright 1998-2025 by Bill Spitzak and others.
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*
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* This library is free software. Distribution and use rights are outlined in
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* the file "COPYING" which should have been included with this file. If this
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* file is missing or damaged, see the license at:
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*
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* https://www.fltk.org/COPYING.php
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*
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* Please see the following page on how to report bugs and issues:
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*
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* https://www.fltk.org/bugs.php
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*/
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/**
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\file fl_attr.h
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This file defines compiler-specific macros
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*/
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#ifndef _FL_fl_attr_h_
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#define _FL_fl_attr_h_
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/**
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This macro makes it safe to use the C++11 keyword \c override with
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older compilers.
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Since FLTK 1.5.0 a C++11 capable compiler is required, hence we can safely
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define FL_OVERRIDE unconditionally as 'override'.
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This macro is kept for backwards compatibility with old (1.4.x) user code
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that uses the FL_OVERRIDE macro.
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We recommend to use 'override' explicitly if C++11 or higher is available.
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*/
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#define FL_OVERRIDE override
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/**
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This section lists macros for Doxygen documentation only. The next section
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will define the actual macros based on the compile used and based on the
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capabilities of the version of that compiler.
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*/
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#ifdef FL_DOXYGEN
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/** To be used in prototypes with a variable list of arguments.
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This macro helps detection of mismatches between format string and
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argument list at compilation time.
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Usage example: FL/fl_ask.H
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*/
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#define __fl_attr(x)
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/**
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Enclosing a function or method in FL_DEPRECATED marks it as no longer
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recommended. This macro syntax can not be used if the return type contains
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a comma, which is not the case in FLTK.
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\code
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FL_DEPRECATED("Outdated, don't use", int position()) { return position_; }
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\endcode
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*/
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#define FL_DEPRECATED(msg, func) \
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/##*##* \deprecated msg *##/ \
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func
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#else /* FL_DOXYGEN */
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// If FL_NO_DEPRECATED is defined FLTK 1.4 can compile 1.3.x code without
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// issuing several "deprecated" warnings (1.3 "compatibility" mode).
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// FL_DEPRECATED will be defined as a no-op.
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// If FL_NO_DEPRECATED is not defined (default) FLTK 1.4 will issue several
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// "deprecated" warnings depending on the compiler in use: FL_DEPRECATED
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// will be defined according to the capabilities of the compiler (below).
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// The definition below this comment must match the one at the end of this file.
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#if defined(FL_NO_DEPRECATED)
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#define FL_DEPRECATED(msg, func) func
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#endif
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#ifdef __cplusplus
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/*
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Declare macros specific to Visual Studio.
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Visual Studio defines __cplusplus = '199711L' in all its versions which is
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not helpful for us here. For VS version number encoding see:
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https://learn.microsoft.com/en-us/cpp/preprocessor/predefined-macros
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This document specifies that the macro _MSVC_LANG is defined since
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"Visual Studio 2015 Update 3" as 201402L (default) and undefined in
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earlier versions. It can be used to determine the C++ standard as
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specified by the /std:c++ compiler option:
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- /std:c++14 201402L (also if /std:c++ is not used)
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- /std:c++17 201703L
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- /std:c++20 202002L
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- /std:c++latest a "higher, unspecified value" (docs of VS 2022)
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As of this writing (02/2023) _MSVC_LANG is not yet used in this file
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but it is documented for future use.
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*/
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#if defined(_MSC_VER)
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#if (_MSC_VER >= 1900) // Visual Studio 2015 (14.0)
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#endif // Visual Studio 2015 (14.0)
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#if (_MSC_VER >= 1400) // Visual Studio 2005 (8.0)
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#ifndef FL_DEPRECATED
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#define FL_DEPRECATED(msg, func) __declspec(deprecated(msg)) func
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#endif
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#endif // Visual Studio 2005 (8.0)
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#if (_MSC_VER >= 1310) // Visual Studio .NET 2003 (7.1)
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#ifndef FL_DEPRECATED
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#define FL_DEPRECATED(msg, func) __declspec(deprecated) func
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#endif
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#endif // Visual Studio .NET 2003 (7.1)
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#endif // Visual Studio
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/*
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Declare macros specific to the C++ standard used.
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Macros may have been declared already in previous sections.
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*/
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#if (__cplusplus >= 202002L) // C++20
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#endif // C++20
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#if (__cplusplus >= 201703L) // C++17
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#endif // C++17
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#if (__cplusplus >= 201402L) // C++14
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#ifndef FL_DEPRECATED
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#define FL_DEPRECATED(msg, func) [[deprecated(msg)]] func
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#endif
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#endif // C++14
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#if (__cplusplus >= 201103L) // C++11
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#endif // C+11
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#if (__cplusplus >= 199711L) // C++89
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#endif // C++89
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#endif // __cplusplus
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/*
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Declare macros specific to clang
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Macros may have been declared already in previous sections.
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*/
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#if defined(__clang__)
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#define FL_CLANG_VERSION (__clang_major__ * 10000 + __clang_minor__ * 100 + __clang_patchlevel__)
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// -- nothing yet --
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#endif /* __clang__ */
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/*
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Declare macros specific to gcc.
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Macros may have been declared already in previous sections.
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*/
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#if defined(__GNUC__)
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#define FL_GCC_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
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#ifndef __fl_attr
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#define __fl_attr(x) __attribute__ (x)
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#endif
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#if FL_GCC_VERSION > 40500 /* gcc 4.5.0 */
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#ifndef FL_DEPRECATED
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#define FL_DEPRECATED(msg, func) func __attribute__((deprecated(msg)))
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#endif
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#endif /* gcc 4.5.0 */
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#if FL_GCC_VERSION >= 30400 /* gcc 3.4.0 */
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#ifndef FL_DEPRECATED
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#define FL_DEPRECATED(msg, func) func __attribute__((deprecated))
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#endif
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#endif /* gcc 3.4.0 */
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#endif /* __GNUC__ */
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/*
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If a macro was not defined in any of the sections above, set it to no-op here.
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*/
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#ifndef __fl_attr
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#define __fl_attr(x)
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#endif
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#ifndef FL_DEPRECATED
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#define FL_DEPRECATED(msg, func) func
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#endif
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#endif /* FL_DOXYGEN */
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#endif /* !_FL_fl_attr_h_ */
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